#557BC9#557BC9

#557BC9 is a mid, vivid blue. Relative luminance 0.203; OKLCH L 59.1% C 0.127 H 263.4°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#557BC9
RGB	rgb(85, 123, 201)
HSL	hsl(220, 52%, 56%)
HSV	hsv(220, 58%, 79%)
CMYK	cmyk(57.7%, 38.8%, 0%, 21.2%)
CIE-LAB	lab(52.19, 10.11, -44.60)
CIE-LCH	lch(52.19, 45.73, 282.77°)
OKLab	oklab(59.11% -0.0147 -0.1265)
OKLCH	oklch(59.11% 0.127 263.4)
XYZ	xyz(21.3683, 20.3125, 58.0417)
Luminance	0.2031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BC9 #C9A355

analogous

#55B5C9 #557BC9 #6955C9

triadic

#557BC9 #C9557B #7BC955

tetradic

#557BC9 #C955B5 #C9A355 #55C969

square

#557BC9 #C955B5 #C9A355 #55C969

split-complementary

#557BC9 #C96955 #B5C955

monochromatic

#27437C #365CAB #557BC9 #839FD8 #B2C3E7

Accessibility & contrast

On white

4.15

#557BC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#557BC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BC9

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BC9	#FFFFFF	#000000	##000000
##557BC9	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A82CC

Deuteranopia (green-blind)

#4B78C7

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #557bc9;
/* rgb */ color: rgb(85, 123, 201);
/* oklch */ color: oklch(59.1% 0.127 263.4);

Tailwind

colors: {
  custom: {
    50: '#8ea0da',
    500: '#557bc9',
    950: '#000000',
  },
}

SCSS

$custom: #557bc9;
$custom-light: #8ea0da;
$custom-dark: #000000;

JSON

{
  "hex": "#557bc9",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 201
  },
  "hsl": {
    "h": 220.345,
    "s": 51.786,
    "l": 56.078
  },
  "oklch": {
    "l": 0.59111,
    "c": 0.12737,
    "h": 263.4
  },
  "luminance": 0.20314
}

Semantic roles & 50–950 ramp

primary

#557BC9

secondary

#D5C5A5

accent

#AC4DDB

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #557BC9

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →